Lightroom (latest cc version) crashes constantly. Especially when creating virtual copies of an image and switching to development mode. Sometimes it crashes after creating a virtual copy, then selecting the new copy, then hitting D to switch to development mode. Sometimes it crashes when I delete one of my virtual copies while in development mode. Sometimes it crashes when I'm not in development mode and I try to delete a virtual copy. When I say crash, it actually becomes unresponsive and Windows gives the standard (this program is unresponsive) message. It doesn't matter how long I wait. I just have to click on it, then click close on the Windows (this program is unresponsive) message.